66668067 has 12 divisors (see below), whose sum is σ = 101963160. Its totient is φ = 41830848.

The previous prime is 66668051. The next prime is 66668143. The reversal of 66668067 is 76086666.

It is a happy number.

It is not a de Polignac number, because 66668067 - 2⁴ = 66668051 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66668027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217717 + ... + 218022.

It is an arithmetic number, because the mean of its divisors is an integer number (8496930).

Almost surely, 2^66668067 is an apocalyptic number.

66668067 is a deficient number, since it is larger than the sum of its proper divisors (35295093).

66668067 is a wasteful number, since it uses less digits than its factorization.

66668067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435762 (or 435759 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 66668067 is about 8165.0515613804. The cubic root of 66668067 is about 405.4829720551.

The spelling of 66668067 in words is "sixty-six million, six hundred sixty-eight thousand, sixty-seven".